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Idaho Class D Knowledge Practice Test
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Passing target: 85% (34/40)
Traffic Signals & Road MarkingsStandalone practice
How may a two-way shared center turn lane be used?
A three-lane two-way road has an empty shared center lane. Solid yellow lines are outside, beside the through lanes; broken yellow lines are inside, beside the shared lane. Opposite white left-turn arrows mark the shared lane. Blue A faces east and silver B faces west in their own through lanes.
Correct answer: For left turns, or U-turns where permitted
Why
A shared center lane is reserved for turning movements from either direction; drivers must not travel along it or interfere with another turning vehicle.
Verified against Idaho Driver’s Handbook, July 2026 · Shared center lane use · p. 58
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